[英]Terminating app due to uncaught exception 'NSInvalidArgumentException', in iPhone programming
i've the following code for button creation and on action of button , i'm calling buildUI method 我有以下代码用于按钮创建以及按钮的操作,我正在调用buildUI方法
CGRect cgRct = CGRectMake(10 ,30 ,400, 320); //define size and position of view
subMainView_G_obj = [[UIView alloc] initWithFrame:cgRct]; //initilize the view
subMainView_G_obj.autoresizesSubviews = YES;
//set view property ov controller to the newly created view
// create Button's for modules in array (UIButtonTypeRoundedRect)
UIButton_G_obj = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
UIButton_G_obj.frame = CGRectMake(100,30,100,50);
[UIButton_G_obj setTitle:@"UI" forState:UIControlStateNormal];
UIButton_G_obj.backgroundColor = [UIColor clearColor];
[subMainView_G_obj addSubview:UIButton_G_obj];
//[UIButton_G_obj setEnabled:TRUE];
[UIButton_G_obj addTarget:subMainView_G_obj action:@selector(buildUIWorkArea) forControlEvents:UIControlEventTouchUpInside];
[mainView_G_obj addSubview:subMainView_G_obj];
} -(void)buildUIWorkArea { //UIView* uiWorkAreaView_G_obj; }-(void)buildUIWorkArea {// UIView * uiWorkAreaView_G_obj; [uiWorkAreaView_G_obj clearsContextBeforeDrawing];
[uiWorkAreaView_G_obj clearsContextBeforeDrawing]; CGRect cgRct2 = CGRectMake(0.0, 0.0, 480, 320);
CGRect cgRct2 = CGRectMake(0.0,0.0,480,320); //define size and position of View uiWorkAreaView_G_obj = [[UIView alloc] initWithFrame:cgRct2];
//定义View的大小和位置uiWorkAreaView_G_obj = [[UIView alloc] initWithFrame:cgRct2]; //initilize the view uiWorkAreaView_G_obj.autoresizesSubviews = YES;
//初始化视图uiWorkAreaView_G_obj.autoresizesSubviews = YES;
(UIButtonTypeRoundedRect)buttonUIObj = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
buttonUIObj.frame = CGRectMake(100.30,100,50);
[buttonUIObj setTitle:BUTTON forState:UIControlStateNormal];
buttonUIObj.backgroundColor = [UIColor clearColor];
[uiWorkAreaView_G_obj addSubview:buttonUIObj];
[buttonUIObj addTarget:uiWorkAreaView_G_obj action:@selector(showModuleView:) forControlEvents:UIControlEventTouchUpInside];
[mainView_G_obj clearsContextBeforeDrawing];
[mainView_G_obj addSubview:uiWorkAreaView_G_obj];
} }
On click of button UI which is on UIView uiWorkAreaView_G_obj , it has to create one more button BUTTON on UIView uiWorkAreaView_G_obj.and after placing the button each of there subviews, i'm placing those subviews upon a common mainview_G_obj of type UIView. 在UIView uiWorkAreaView_G_obj上单击按钮UI时,它必须在UIView uiWorkAreaView_G_obj上再创建一个按钮BUTTON,然后在每个子视图中放置按钮后,将这些子视图放置在UIView类型的通用mainview_G_obj上。 But its throwing an exception .......
但是它抛出一个异常.......
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[UIView buildUIWorkArea]:unrecognized selector sent to instance 0x57ca80'
i didn't understand why its taking buildUIWorkArea's return type as UIView , when i've declared its return type as void. 我不明白为什么我将buildUIWorkArea的返回类型声明为void时将其作为UIView。
plz help. 请帮助。
[UIButton_G_obj addTarget:subMainView_G_obj action:@selector(buildUIWorkArea)
forControlEvents:UIControlEventTouchUpInside];
This line means that, when the user touch-up-inside the button, the following function will be called: 该行表示,当用户触摸按钮内部时,将调用以下功能:
[subMainView_G_obj buildUIWorkArea];
Since subMainView_G_obj
is a plain UIView, there's no -buildUIWorkArea
method and thus the error. 由于
subMainView_G_obj
是普通的UIView,因此没有-buildUIWorkArea
方法,因此没有错误。 The return type of -buildUIWorkArea
is irrelevant. -buildUIWorkArea
的返回类型无关紧要。
You probably want to send -buildUIWorkArea
to self
instead: 您可能想将
-buildUIWorkArea
发送给self
:
[UIButton_G_obj addTarget:self action:@selector(buildUIWorkArea)
forControlEvents:UIControlEventTouchUpInside];
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